EXPERIMENTAL AND FINITE ELEMENT INVESTIGATION OF ADDED MASS EFFECTS ON SHIP STRUCTURES

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Authors
  1. Glenwright, D.G.
  2. Hutton, S.G.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);British Columbia Univ, Vancouver BC (CAN) Dept of Mechanical Engineering
Abstract
The report contains the results of an investigation to: (1) evaluate the fluid modelling characteristics of VAST; (2) determine experimentally the lowest natural frequencies and mode shapes of a ship model floating in water; and (3) compare the natural frequencies and mode shapes predicted by VAST with those measured. The fluid modelling capabilities of VAST were evaluated by comparison with experimental results, and the effect of fluid element type and mesh discretization were considered. The natural frequencies and mode shapes of an 8' long ship model were measured both in air and in water. The lowest four modes involving vertical bending and horizontal/torsional motion were measured and the effects of increased load were recorded. Comparison of experimental and numerical results showed good comparison for vertical bending modes but poor comparison for the horizontal/torsional modes.
Report Number
DREA-CR-87-464 — Contractor Report
Date of publication
15 Oct 1987
Number of Pages
176
DSTKIM No
88-02006
CANDIS No
55236
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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